The sound of a dull lawnmower blade tearing through your grass is a sure sign that it’s time for a sharpening. While you could take your mower to a professional, there’s a certain satisfaction in taking matters into your own hands and sharpening the blade yourself. But what if you don’t have a specialized lawnmower blade sharpener? This article will guide you through building your own, simple and effective sharpening tool using readily available materials. You’ll learn about the different types of sharpeners you can create, the necessary materials, and step-by-step instructions for assembling and using your homemade tool.
A Quick Overview
There are a few common ways to make a DIY lawnmower blade sharpener. These include using a simple sharpening steel, creating a clamping jig with sandpaper, and even repurposing an old file. We’ll explore the pros and cons of each method and provide detailed instructions for building each type of sharpener.
The Sharpening Steel Method
This is perhaps the most straightforward method for sharpening a lawnmower blade. All you need is a sharpening steel, a sturdy base, and a few screws.
Materials:
- A sharpening steel (preferably with a round cross-section)
- A piece of plywood or sturdy wood (approximately 12 inches by 12 inches)
- Screws and a screwdriver
- A drill
- Optional: A piece of rubber or cork (for cushioning)
Assembling the Sharpener:
- Mount the sharpening steel: Place the sharpening steel on the plywood and mark its position. Drill pilot holes into the plywood for the screws, making sure the holes are slightly smaller than the screw diameter.
- Secure the steel: Attach the sharpening steel to the plywood using the screws, ensuring it is firmly secured.
- Add cushioning (optional): If you want a softer surface, you can attach a piece of rubber or cork to the plywood before mounting the steel. This will help absorb vibration during sharpening.
Using the Sharpener:
- Position the blade: Carefully place the lawnmower blade onto the sharpening steel, ensuring the blade edge is facing the steel.
- Sharpen: Apply firm pressure and use a smooth, sweeping motion to sharpen the blade. Move the blade along the steel in a consistent direction.
- Check for sharpness: Regularly check the blade edge for sharpness using your thumb. If you can’t feel a sharp edge, continue sharpening.
The Clamping Jig Method
This method involves creating a jig that holds the blade securely while allowing you to sharpen it using sandpaper.
Materials:
- Two pieces of plywood or sturdy wood (approximately 8 inches by 8 inches)
- Screws and a screwdriver
- A drill
- Clamps
- Sandpaper (various grits)
Assembling the Jig:
- Drill holes: Drill two parallel holes in each piece of plywood, making sure they align when the pieces are placed together. The holes should be large enough to accommodate the blade.
- Secure the blade: Place the blade between the two pieces of plywood and clamp them together. The blade should be securely held in place.
- Sharpen: Use sandpaper of various grits, starting with a coarse grit and gradually moving to a finer grit, to sharpen the blade edge.
Using the Jig:
- Secure the blade: Place the blade in the jig and tighten the clamps.
- Sharpen: Use the sandpaper, applying pressure and moving it along the blade edge.
- Release the blade: Once sharpening is complete, remove the clamps and take out the blade.
Repurposing an Old File
You can even repurpose an old file to create a functional lawnmower blade sharpener. This method requires some modifications to the file but can be quite effective.
Materials:
- An old file (ideally with a flat surface)
- A metal cutting tool (such as a hacksaw or angle grinder)
- A vice or clamping mechanism
- A piece of wood (optional)
Assembling the Sharpener:
- Shape the file: Use a metal cutting tool to shape the file into a blade-like shape. The sharpened edge should be slightly rounded to better conform to the curvature of the lawnmower blade.
- Secure the file: Secure the modified file in a vice or clamp. You can also mount it onto a piece of wood for a more stable base.
Using the Sharpener:
- Position the blade: Place the lawnmower blade against the sharpened edge of the file, making sure the blade edge is facing the file.
- Sharpen: Use a smooth, sweeping motion to sharpen the blade. You can use a little pressure, but be careful not to bend the blade.
- Check for sharpness: Regularly check the blade edge for sharpness using your thumb.
Safety Precautions:
- Wear safety glasses: Always wear safety glasses when working with metal tools.
- Use caution with power tools: If using power tools like a drill or angle grinder, be extra careful and always follow the manufacturer’s instructions.
- Handle blades with care: Be mindful of sharp edges and always handle blades carefully.
Tips for Sharpening a Lawn Mower Blade
- Sharpen both sides: Always sharpen both sides of the blade for even cutting.
- Maintain a consistent angle: Try to maintain a consistent angle while sharpening.
- Use a light touch: Use a light touch to avoid over-sharpening or damaging the blade.
- Test for sharpness: After sharpening, test the blade for sharpness using your thumb or a piece of paper.
Conclusion
Creating a DIY lawnmower blade sharpener is an excellent way to save money and ensure a smooth and efficient mowing experience. By choosing the method that suits your needs and following the instructions carefully, you can build a reliable and effective tool. Remember to prioritize safety and always handle sharp tools with care. With a little effort, you can have your lawnmower blades sharp and ready to tackle any grass.
FAQ
What is a lawnmower blade sharpener?
A lawnmower blade sharpener is a tool specifically designed to sharpen the cutting edges of your lawnmower blades. These sharpeners come in various forms, from simple hand-held tools to more sophisticated electric or bench-mounted models. They work by grinding down the dull blade, restoring its sharpness and ensuring a clean, even cut for your lawn. By using a lawnmower blade sharpener, you can avoid damaging your lawn and extend the life of your mower blades, saving you money in the long run.
Why is it important to sharpen my lawnmower blades?
Sharpening your lawnmower blades is crucial for several reasons. Firstly, sharp blades provide a clean, even cut, resulting in a healthy, aesthetically pleasing lawn. Secondly, sharp blades reduce stress on your mower’s engine, making it operate more efficiently and consume less fuel. Finally, sharp blades can prevent damage to your lawn. Dull blades can tear and shred grass, leaving behind brown patches and promoting disease.
What types of lawnmower blade sharpeners are available?
There are different types of lawnmower blade sharpeners available, each with its own advantages and disadvantages. Hand-held sharpeners are simple and affordable, ideal for occasional sharpening. Electric sharpeners offer faster and more precise sharpening but come at a higher price. Bench-mounted sharpeners provide excellent control and durability but require a dedicated space and some setup. Choosing the right type depends on your needs and budget.
How often should I sharpen my lawnmower blades?
The frequency of sharpening depends on factors like the type of lawnmower, the size of your lawn, and the type of grass you have. However, a general rule of thumb is to sharpen your blades at least once a year. You can also inspect your blades regularly for any signs of dullness or damage, such as a rounded or chipped edge.
What safety precautions should I take when sharpening lawnmower blades?
Sharpening lawnmower blades requires caution and safety measures. Always unplug the lawnmower and remove the spark plug wire before working on the blades. Wear protective gear like gloves and safety glasses to avoid potential injuries. Use a stable work surface to avoid the blade falling and causing harm.
Can I use a regular file to sharpen my lawnmower blades?
While a regular file can be used, it is not the most efficient or accurate method. A dedicated lawnmower blade sharpener is specifically designed for the task and will produce sharper, more durable edges. A file can be difficult to use correctly and may leave uneven edges, leading to a less efficient cut.
What are some tips for sharpening my lawnmower blades?
When sharpening your lawnmower blades, maintain a consistent angle across the entire cutting edge. The angle should be around 30 degrees, but check the manufacturer’s recommendations for your specific model. Use even strokes and avoid excessive pressure to prevent damaging the blade. Once you’ve sharpened both sides, test the blade on a piece of cardboard to ensure it is sharp enough.